EV0034 Datasheet, PDF (4/4 Pages) Monolithic Power Systems – 2A, 1.3MHz Step-Up Converter

EV0034 – 2A, 1.3MHz STEP-UP CONVERTER
EVALUATION BOARD
QUICK START GUIDE
The EV0034 is configured to produce a fixed 12V output voltage from an input voltage ranging from
2.6V to 12V:
1. Connect the positive and negative terminals of the load to the OUT and GND pins, respectively.
2. Preset the power supply output to between 2.6V and 12V, then turn it off.
3. Connect the positive and negative terminals of the power supply output to the IN and GND pins,
respectively.
4. Connect the IN pin of the chip to the regulator’s input supply V_IN for bootstrapped operation
(boot-strapped operation is required for VIN of less than 3V) through the IC Power jumper.
5. Turn the power supply on. The board is set up for automatic startup. Shunt the ENABLE jumper
to disable the circuit. EN may be driven with an external digital signal to enable/disable the
circuit.
6. Connect V_IN to the input power source and apply a 2.6V to 12V voltage.
7. To enable the MP1527 by an external signal, connect a 0V to 2V signal to the EN input. A low
voltage at EN turns off the MP1527, a high voltage turns it on.
8. The output voltage V_OUT can be altered by changing the value of R2. Determine the new value
of R2 using the following formula:
R2
=
R3
×
⎜⎜⎝⎛
V_OUT
V_FB
− 1_{⎟⎟⎠⎞}
Where V_FB=1.22V and R3 remains 10kΩ.
NOTICE: The information in this document is subject to change without notice. Please contact MPS for current specifications.
Users should warrant and guarantee that third party Intellectual Property rights are not infringed upon when integrating MPS
products into any application. MPS will not assume any legal responsibility for any said applications.
EV0034 Rev. 1.1
www.MonolithicPower.com
4
2/16/2006
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